tomcat9: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat cause...
CVE-2026-77756 is fixed in 27 products on 1 platform, first by DEBIAN-CVE-2026-77756, released September 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat caused by processing the transfer-encoding header for an HTTP/1.0 request may allow an attacker to cause one request from another user to fail when Tomcat is located behind a reverse proxy. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.47 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.67 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libtcnative-1-0 · opensuse-leap 16.0 | 1.3.9-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| libtcnative-1-0 · sles 15.6 | 1.3.9-150600.16.9.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| libtcnative-1-0 · sles 15.7 | 1.3.9-150600.16.9.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| libtcnative-1-0 · sles 16.0 | 1.3.9-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| libtcnative-2-0 · opensuse-leap 16.0 | 2.0.16-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| libtcnative-2-0 · sles 16.0 | 2.0.16-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat · opensuse-leap 16.0 | 9.0.122-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| tomcat · sles 15.6 | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat · sles 15.7 | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat · sles 16.0 | 9.0.122-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat10 · Debian 14 | 10.1.60-1 | DEBIAN-CVE-2026-77756 | Sep 24, 2026 |
| tomcat10 · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10 · opensuse-leap 16.0 | 10.1.60-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| tomcat10 · sles 15.6 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat10 · sles 15.7 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat10 · sles 16.0 | 10.1.60-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat10-admin-webapps · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-docs-webapp · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-el-5.0-api · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-jsp-3.1-api · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-lib · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-servlet-6.0-api · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-webapps · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat11 · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11 · opensuse-leap 16.0 | 11.0.26-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| tomcat11 · sles 15.6 | 11.0.26-150600.13.36.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| tomcat11 · sles 15.7 | 11.0.26-150600.13.36.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| tomcat11 · sles 16.0 | 11.0.26-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat11-admin-webapps · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-docs-webapp · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-el-6.0-api · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-jsp-4.0-api · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-lib · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-servlet-6.1-api · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-webapps · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat9 · Debian 12.15 (bookworm) | 9.0.70-2 | DEBIAN-CVE-2026-77756 | Sep 24, 2026 |
| tomcat9 · Debian 13.5 (trixie) | 9.0.70-2 | DEBIAN-CVE-2026-77756 | Sep 24, 2026 |
| tomcat9 · Debian 14 | 9.0.70-2 | DEBIAN-CVE-2026-77756 | Sep 24, 2026 |
| tomcat9 · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-admin-webapps · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-docs-webapp · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-el-3.0-api · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-jsp-2.3-api · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-lib · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-servlet-4.0-api · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-webapps · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
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